CN103193331B - Antisludging agent for low temperature flue gas heat exchange equipment of boiler and preparation method thereof - Google Patents
Antisludging agent for low temperature flue gas heat exchange equipment of boiler and preparation method thereof Download PDFInfo
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Abstract
The invention provides an antisludging agent for low temperature flue gas heat exchange equipment of a boiler and a preparation method thereof. The preparation method comprises: putting a solvent, 1/2 mass of polymerization inhibitor and 1/2 mass of metal passivator in a container, stirring the matters at a constant temperature until the matters are completely dissolved; adding a calcic detergent dispersant and an organic dispersant according to a proportion, stirring the mixture at a constant temperature until the mixture is completely dissolved; and finally, adding the 1/2 mass of polymerization inhibitor, the 1/2 mass of metal passivator and a diamine acid acceptor according to a proportion, and stirring the mixture at a constant temperature until the mixture is completely dissolved to obtain the antisludging agent for low temperature flue gas heat exchange equipment of boiler. The antisludging agent has the characteristics of little feeding dosage, good economical efficiency and practicability, and high scale inhibition rate, and the like, and the antisludging agent can be used for inhibiting and slowing the coking and scaling problems of low temperature flue gas in the heat exchange equipment, so that the antisludging agent has high generalization and application values and a brilliant market prospect.
Description
Technical field
The present invention relates to a kind of Scale inhibitors, be specifically related to a kind of Scale inhibitors for the boiler smoke heat-exchange equipment and preparation method thereof.
Background technology
Gas fired-boiler fume emission long-term corrosion heat-exchange equipment or the chimney of steel enterprise have caused serious problem, this is mainly to contain sulfurous acid in the flue gas due to the gas fired-boiler discharge, sulfuric acid, sulfide, muriate, sour gas and the acidic substance such as thiocyanide, add interchanger in flue after, flue gas flow rate slows down, easily in heat exchanger surface coking fouling, have a strong impact on the heat exchange efficiency of interchanger, especially the higher boiler at coke-oven gas content, unburn organism and sulphite completely in coke-oven gas, when the trace dust combines, coking, enough serious, from forming, incrustation formed by organism and inorganics, so it is loaded down with trivial details that interchanger cleans, the device cycle of operation obviously shortens, energy consumption increases, economical efficiency obviously descends, the coking scale inhibition of visible heat-exchange equipment has become the subject matter of confining device long-term operation.
Summary of the invention
The object of the present invention is to provide Scale inhibitors for the boiler low-temperature fume heat-exchange equipment that a kind of scale inhibition efficiency is high, acid resistance is good and preparation method thereof.
In order to achieve the above object, the present invention is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, comprise 10～20% stopper, 1～5% metal passivator, 15～25% calcic detergent-dispersant additive, 20～40% organic dispersing agent, 2～5% Diamines acid-acceptor and 5～50% solvents that mixed with arbitrary proportion by normal hexane and ethanol.
Described stopper is Polyamide-Polyamsne-Epichlorohydrin or POLYBUTADIENE EPOXY RESIN.
Described metal passivator is trimeric cyanamide, benzotriazole or oxine.
Described calcic detergent-dispersant additive is long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate or calcium sulfenyl phenolate.
The mixture that described organic dispersing agent is any one or multiple arbitrary proportion in triethyl hexyl phosphoric acid, methyl amyl alcohol, polyacrylamide, fatty acid ester macrogol ester.
Described Diamines acid-acceptor is hexanediamine or quadrol.
This preparation method for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment comprises the following steps:
The solvent that 1) will be mixed with arbitrary proportion by normal hexane and ethanol adds in container, stirring is warming up to 45～65 ℃, then add the stopper of 1/2 quality and the metal passivator of 1/2 quality, constant temperature is stirred to stopper and metal passivator dissolves fully, obtains mixed solution A;
2) add calcic detergent-dispersant additive, organic dispersing agent in mixed solution A, and stir at 45～65 ℃ of lower constant temperature, calcic detergent-dispersant additive and organic dispersing agent are dissolved fully, obtain mixing solutions B;
3) add the stopper of 1/2 quality and metal passivator, the Diamines acid-acceptor of 1/2 quality in mixing solutions B, and be stirred to stopper, metal passivator and Diamines acid-acceptor at 45～65 ℃ of lower constant temperature and dissolve fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Described step 2) time that constant temperature stirs is 0.5～1h.
The time that described step 3) constant temperature stirs is 1～1.5h.
Compared with prior art, beneficial effect of the present invention is:
The present invention has the scale inhibition high efficiency, prevents the advantages such as heat-exchange equipment coking scale inhibition, when the filling rate of Scale inhibitors is 60g/ ten thousand m
3, scale inhibition performance can reach more than 80%; Therefore Scale inhibitors of the present invention has filling rate few, economical and practical, scale inhibition performance is high, can be used in inhibition, slow down the coking and fouling of low-temperature flue gas various devices and equipment in discharge process, ensure the safe operation of interchanger heat exchange efficiency and boiler, be particularly useful for the coking and fouling in the heat-exchange equipment process, it has filled up the blank of the Scale inhibitors aspect of boiler low-temperature fume heat-exchange system, has highly application value and good market outlook.And the interchanger that Scale inhibitors of the present invention is crossed with appropriate design combines, can fundamentally avoid coking material coking on interchanger in flue gas, ensure heat exchange efficiency.
Embodiment
Embodiment 1:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, comprise 10% Polyamide-Polyamsne-Epichlorohydrin (PAE), 2% benzotriazole, 20% calcium sulfenyl phenolate, methyl amyl alcohol that 30% mass ratio is 1:2 and triethyl hexyl phosphoric acid mixed solution, 3% hexanediamine and 35% solvent mixed with the volume ratio of 1:1 by normal hexane and ethanol.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 1:1 by normal hexane and ethanol adds in container, stirring is warming up to 45 ℃, then add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and the benzotriazole of 1/2 quality, constant temperature is stirred to Polyamide-Polyamsne-Epichlorohydrin and benzotriazole dissolves fully, obtains mixed solution A;
2) add calcium sulfenyl phenolate, methyl amyl alcohol and triethyl hexyl phosphoric acid mixed solution in mixed solution A, and stir 0.5h at 45 ℃ of lower constant temperature, calcium sulfenyl phenolate and methyl amyl alcohol and triethyl hexyl phosphoric acid mixed solution are dissolved fully, obtain mixing solutions B;
3) add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and benzotriazole, the hexanediamine of 1/2 quality in mixing solutions B, and stir 1h at 45 ℃ of lower constant temperature, Polyamide-Polyamsne-Epichlorohydrin, benzotriazole and hexanediamine are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Embodiment 2:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, the mixed solution, 4% hexanediamine and 23% solvent mixed with the volume ratio of 1:2 by normal hexane and ethanol that comprise 15% Polyamide-Polyamsne-Epichlorohydrin (PAE), 3% oxine, 25% long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, methyl amyl alcohol that 30% mass ratio is 2:1 and polyacrylamide.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 1:2 by normal hexane and ethanol adds in container, stirring is warming up to 50 ℃, then add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and the oxine of 1/2 quality, constant temperature is stirred to Polyamide-Polyamsne-Epichlorohydrin and oxine dissolves fully, obtains mixed solution A;
2) to the mixed solution that adds long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, methyl amyl alcohol and polyacrylamide in mixed solution A, and 50 ℃ of lower constant temperature stir 1h, the mixed solution of long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate and methyl amyl alcohol and polyacrylamide is dissolved fully, obtain mixing solutions B;
3) add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and oxine, the hexanediamine of 1/2 quality in mixing solutions B, and stir 1h at 50 ℃ of lower constant temperature, Polyamide-Polyamsne-Epichlorohydrin, oxine and hexanediamine are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
The filling rate of the Scale inhibitors made at the present embodiment is 60g/ ten thousand m
3the time, scale inhibition performance can reach 83.27%.
Embodiment 3:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, the mixed solution, 3% quadrol and 19% solvent mixed with the volume ratio of 2:3 by normal hexane and ethanol that comprise 20% POLYBUTADIENE EPOXY RESIN, 3% trimeric cyanamide, 25% long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, methyl amyl alcohol that 30% mass ratio is 3:1 and fatty acid polyglycol ester.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 2:3 by normal hexane and ethanol adds in container, stirring is warming up to 60 ℃, then the trimeric cyanamide that adds POLYBUTADIENE EPOXY RESIN and 1/2 quality of 1/2 quality, constant temperature is stirred to POLYBUTADIENE EPOXY RESIN and trimeric cyanamide dissolves fully, obtains mixed solution A;
2) to the mixed solution that adds long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, methyl amyl alcohol and fatty acid polyglycol ester in mixed solution A, and stir 0.5h at 60 ℃ of lower constant temperature, the mixed solution of long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate and methyl amyl alcohol and fatty acid polyglycol ester is dissolved fully, obtain mixing solutions B;
3) to the trimeric cyanamide, the quadrol that add POLYBUTADIENE EPOXY RESIN and 1/2 quality of 1/2 quality in mixing solutions B, and stir 1h at 60 ℃ of lower constant temperature, POLYBUTADIENE EPOXY RESIN, trimeric cyanamide and quadrol are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Embodiment 4:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, comprise 20% POLYBUTADIENE EPOXY RESIN, 4% trimeric cyanamide, 25% calcium sulfenyl phenolate, 35% triethyl hexyl phosphoric acid, 5% quadrol and 11% solvent mixed with the volume ratio of 1:3 by normal hexane and ethanol.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 1:3 by normal hexane and ethanol adds in container, stirring is warming up to 65 ℃, then the trimeric cyanamide that adds POLYBUTADIENE EPOXY RESIN and 1/2 quality of 1/2 quality, constant temperature is stirred to POLYBUTADIENE EPOXY RESIN and trimeric cyanamide dissolves fully, obtains mixed solution A;
2) add calcium sulfenyl phenolate and triethyl hexyl phosphoric acid in mixed solution A, and stir 0.5h at 65 ℃ of lower constant temperature, calcium sulfenyl phenolate and triethyl hexyl phosphoric acid are dissolved fully, obtain mixing solutions B;
3) to the trimeric cyanamide, the quadrol that add POLYBUTADIENE EPOXY RESIN and 1/2 quality of 1/2 quality in mixing solutions B, and stir 1h at 65 ℃ of lower constant temperature, POLYBUTADIENE EPOXY RESIN, trimeric cyanamide and quadrol are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Embodiment 5:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, comprise 10% Polyamide-Polyamsne-Epichlorohydrin (PAE), 1% benzotriazole, 15% calcium sulfenyl phenolate, 25% polyacrylamide, 2% hexanediamine and 47% solvent mixed with the volume ratio of 4:3 by normal hexane and ethanol.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 4:3 by normal hexane and ethanol adds in container, stirring is warming up to 50 ℃, then add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and the benzotriazole of 1/2 quality, constant temperature is stirred to Polyamide-Polyamsne-Epichlorohydrin and benzotriazole dissolves fully, obtains mixed solution A;
2) add calcium sulfenyl phenolate, polyacrylamide in mixed solution A, and 50 ℃ of lower constant temperature stirring 0.5h, calcium sulfenyl phenolate and polyacrylamide are dissolved fully, obtain mixing solutions B;
3) add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and benzotriazole, the hexanediamine of 1/2 quality in mixing solutions B, and stir 1.5h at 50 ℃ of lower constant temperature, Polyamide-Polyamsne-Epichlorohydrin, benzotriazole and hexanediamine are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Embodiment 6:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, comprise 15% Polyamide-Polyamsne-Epichlorohydrin (PAE), 4% trimeric cyanamide, 15% long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, 20% polyacrylamide, 4% quadrol and 42% solvent mixed with the volume ratio of 1:4 by normal hexane and ethanol.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 1:4 by normal hexane and ethanol adds in container, stirring is warming up to 50 ℃, then add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and the trimeric cyanamide of 1/2 quality, constant temperature is stirred to Polyamide-Polyamsne-Epichlorohydrin and trimeric cyanamide dissolves fully, obtains mixed solution A;
2) add long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, polyacrylamide in mixed solution A, and 50 ℃ of lower constant temperature stirring 1h, long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate and polyacrylamide are dissolved fully, obtain mixing solutions B;
3) add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and trimeric cyanamide, the quadrol of 1/2 quality in mixing solutions B, and stir 1.5h at 50 ℃ of lower constant temperature, Polyamide-Polyamsne-Epichlorohydrin, trimeric cyanamide and quadrol are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Embodiment 7:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, comprise 10% Polyamide-Polyamsne-Epichlorohydrin (PAE), 3% benzotriazole, 15% calcium sulfenyl phenolate, 20% polyacrylamide, 2% hexanediamine and 50% solvent mixed with the volume ratio of 4:3 by normal hexane and ethanol.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 4:3 by normal hexane and ethanol adds in container, stirring is warming up to 50 ℃, then add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and the benzotriazole of 1/2 quality, constant temperature is stirred to Polyamide-Polyamsne-Epichlorohydrin and benzotriazole dissolves fully, obtains mixed solution A;
2) add calcium sulfenyl phenolate, polyacrylamide in mixed solution A, and 50 ℃ of lower constant temperature stirring 0.5h, calcium sulfenyl phenolate and polyacrylamide are dissolved fully, obtain mixing solutions B;
3) add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and benzotriazole, the hexanediamine of 1/2 quality in mixing solutions B, and stir 1.5h at 50 ℃ of lower constant temperature, Polyamide-Polyamsne-Epichlorohydrin, benzotriazole and hexanediamine are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Embodiment 8:
The present embodiment is for the Scale inhibitors of boiler low-temperature fume heat-exchange equipment, by mass percentage, the mixed solution, 5% hexanediamine and 5% solvent mixed with the volume ratio of 1:2 by normal hexane and ethanol that comprise 20% Polyamide-Polyamsne-Epichlorohydrin (PAE), 5% oxine, 25% long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, methyl amyl alcohol that 40% mass ratio is 2:1 and polyacrylamide.
The present embodiment comprises the following steps for the preparation method of the Scale inhibitors of boiler low-temperature fume heat-exchange equipment:
The solvent that 1) will be mixed with the volume ratio of 1:2 by normal hexane and ethanol adds in container, stirring is warming up to 50 ℃, then add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and the oxine of 1/2 quality, constant temperature is stirred to Polyamide-Polyamsne-Epichlorohydrin and oxine dissolves fully, obtains mixed solution A;
2) to the mixed solution that adds long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate, methyl amyl alcohol and polyacrylamide in mixed solution A, and 50 ℃ of lower constant temperature stir 0.8h, the mixed solution of long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate and methyl amyl alcohol and polyacrylamide is dissolved fully, obtain mixing solutions B;
3) add the Polyamide-Polyamsne-Epichlorohydrin of 1/2 quality and oxine, the hexanediamine of 1/2 quality in mixing solutions B, and stir 1.2h at 50 ℃ of lower constant temperature, Polyamide-Polyamsne-Epichlorohydrin, oxine and hexanediamine are dissolved fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
Claims (4)
1. the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment, it is characterized in that: by mass percentage, comprise 10～20% stopper, 1～5% metal passivator, 15～25% calcic detergent-dispersant additive, 20～40% organic dispersing agent, 2～5% Diamines acid-acceptor and 5～50% solvents that mixed with arbitrary proportion by normal hexane and ethanol;
Wherein, described stopper is Polyamide-Polyamsne-Epichlorohydrin or POLYBUTADIENE EPOXY RESIN;
Described metal passivator is trimeric cyanamide, benzotriazole or oxine;
Described calcic detergent-dispersant additive is long-chain linear alkyl benzene high base number calcium alkylbenzenesulfonate or calcium sulfenyl phenolate;
The mixture that described organic dispersing agent is one or more arbitrary proportions in triethyl hexyl phosphoric acid, methyl amyl alcohol, polyacrylamide, fatty acid ester macrogol ester;
Described Diamines acid-acceptor is hexanediamine or quadrol.
2. the preparation method of the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment claimed in claim 1, is characterized in that, comprises the following steps:
The solvent that 1) will be mixed with arbitrary proportion by normal hexane and ethanol adds in container, stirring is warming up to 45～65 ℃, then add the stopper of 1/2 quality and the metal passivator of 1/2 quality, constant temperature is stirred to stopper and metal passivator dissolves fully, obtains mixed solution A;
2) add calcic detergent-dispersant additive, organic dispersing agent in mixed solution A, and stir at 45～65 ℃ of lower constant temperature, calcic detergent-dispersant additive and organic dispersing agent are dissolved fully, obtain mixing solutions B;
3) add the stopper of 1/2 quality and metal passivator, the Diamines acid-acceptor of 1/2 quality in mixing solutions B, and be stirred to stopper, metal passivator and Diamines acid-acceptor at 45～65 ℃ of lower constant temperature and dissolve fully, make the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment.
3. the preparation method of the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment according to claim 2 is characterized in that: the time that described step 2) constant temperature stirs is 0.5～1h.
4. the preparation method of the Scale inhibitors for the boiler low-temperature fume heat-exchange equipment according to claim 2 is characterized in that: the time that described step 3) constant temperature stirs is 1～1.5h.
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Families Citing this family (4)
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| CN103436243A (en) * | 2013-08-06 | 2013-12-11 | 中国石油大学(华东) | Safe blocking remover polymer injection well of oil field |
| CN104593780B (en) * | 2014-12-22 | 2017-09-12 | 蔡杰 | A kind of steam circulation system conditioning agent and preparation method thereof |
| CN105036362A (en) * | 2015-06-30 | 2015-11-11 | 苏州佑君环境科技有限公司 | Low-phosphorous and environmental friendly antisludging agent and preparation method of antisludging agent |
| CN115975746A (en) * | 2022-12-29 | 2023-04-18 | 陕西瑞益隆科环保科技有限公司 | Scale inhibitor for coking plant equipment and preparation method thereof |
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Effective date of registration: 20201228 Address after: Weibei Coal Chemical Industrial Park, Pucheng County, Weinan City, Shaanxi Province Patentee after: Pucheng Yuteng New Material Technology Co.,Ltd. Address before: Room 2305, block C, Danfeng International, Gaoxin 4th Road, high tech Zone, Xi'an City, Shaanxi Province, 710075 Patentee before: SHAANXI YUTENG INDUSTRY Co.,Ltd. |